CN217647459U

CN217647459U - Die-casting die

Info

Publication number: CN217647459U
Application number: CN202221468384.6U
Authority: CN
Inventors: 朱建强; 祖连合; 刘军; 王军华
Original assignee: Tangshan Zhisheng Metal Processing Co ltd
Current assignee: Tangshan Zhisheng Metal Processing Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-10-25
Anticipated expiration: 2032-06-14

Abstract

The utility model relates to a die-casting technical field especially relates to a die casting die. The air guide device comprises a base and a lifting plate, wherein the base and the lifting plate are connected in a sliding manner, an exhaust pipe is arranged below the base, a fixed die is arranged above the base, a movable die is arranged below the lifting plate, an air guide groove is arranged on the periphery of a fixed die cavity at the top of the fixed die, a plurality of first exhaust grooves communicated with the fixed die cavity are arranged on the periphery of the fixed die cavity, the first exhaust grooves are communicated with expansion grooves, the first exhaust grooves and the expansion grooves are positioned between the fixed die cavity and the air guide groove, air guide holes are formed in the air guide grooves, and the air guide holes are communicated with the exhaust pipe through the exhaust holes; and a second exhaust groove which is communicated with the expansion groove and the air guide groove when the fixed die and the movable die are combined together is arranged on the movable die cavity at the bottom of the movable die. The utility model discloses be provided with the air discharge duct and make the molten metal wherein solidify with the expansion groove to save hydro-cylinder and slide valve isotructure, the reliability is higher.

Description

Die casting die

Technical Field

The utility model relates to a die-casting technical field especially relates to a die casting die.

Background

The die casting is a casting process, which is to rapidly press molten metal into a cavity of a die by using high pressure, and demould the die after the molten metal is solidified and formed to obtain a required casting. The patent with application number 201420006559.0 discloses a die-casting die, which adopts a vacuumizing runner communicated with a cavity arranged on a fixed die, wherein a vacuumizing device is communicated with the vacuumizing runner, an oil cylinder is fixed on the outer wall of the fixed die, and the oil cylinder drives a slide valve to seal the vacuumizing runner. The structure can vacuumize the cavity, so that an exhaust port is not required to be arranged on a die-casting die, and the problem that air holes can be generated on a workpiece in the die-casting forming process is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the technique that exists is not enough to the aforesaid, provides a die casting die, is provided with the air discharge duct and makes the molten metal wherein solidify with the expansion groove to save hydro-cylinder and slide valve isotructure, the reliability is higher.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a die casting die comprises a base and a lifting plate, wherein the base and the lifting plate are connected in a sliding mode, an exhaust pipe is arranged below the base, a fixed die is arranged above the base, a movable die is arranged below the lifting plate, an air guide groove is formed in the periphery of a fixed die cavity at the top of the fixed die, a plurality of first exhaust grooves communicated with the fixed die cavity are formed in the periphery of the fixed die cavity, the first exhaust grooves are communicated with expansion grooves, the first exhaust grooves and the expansion grooves are located between the fixed die cavity and the air guide grooves, air guide holes are formed in the air guide grooves, and the air guide holes are communicated with the exhaust pipe through the exhaust holes; and a second exhaust groove which is communicated with the expansion groove and the air guide groove when the fixed die and the movable die are combined together is arranged on the movable die cavity at the bottom of the movable die.

Further optimize this technical scheme, be provided with the projection on the fixed die utensil in the position that corresponds with the expansion groove, the projection is the hemisphere type.

Further optimize this technical scheme, the expansion groove is hemisphere type.

Further optimize this technical scheme, the aspirating hole includes that the extending direction that communicates each other is the first aspirating hole of horizontal direction and the extending direction is the second aspirating hole of vertical direction, first aspirating hole and air guide hole intercommunication, the second aspirating hole and exhaust tube intercommunication.

Further optimize this technical scheme, first aspirating hole is located the upper portion of air guide hole.

Compared with the prior art, the utility model has the advantages of it is following: 1. the first exhaust groove is connected with an expansion groove, the speed of molten metal is greatly reduced after the molten metal enters the expansion groove through the first exhaust groove, so that the molten metal is easy to solidify, the cross section of the second exhaust groove is small, and a small amount of molten metal entering the second exhaust groove can be rapidly solidified under the cooling of the mold; 2. the convex column is positioned in the expansion groove and is blocked in front of the first exhaust groove, and the first exhaust groove and the second exhaust groove are not on the same horizontal plane, so that molten metal entering from the first exhaust groove cannot directly face the second exhaust groove, and cannot easily enter the second exhaust groove; 3. the first air exhaust hole is positioned at the upper part of the air guide hole, so that metal particles cannot easily enter the air exhaust hole and cannot enter the vacuum pumping device when entering the air guide hole through the air guide groove; 4. a small amount of air remained in the cavity can be hydraulically fed into the air guide groove, the air guide hole, the first air exhaust hole, the second air exhaust hole, the air exhaust pipe and the vacuum pumping pipeline by metal, so that the air holes are not easy to generate, and the generation of cold lines is reduced; 5. the structure of oil cylinder and slide valve is saved, and the reliability is higher.

Drawings

Fig. 1 is a schematic structural view of a die casting mold.

Fig. 2 is an enlarged view taken at i in fig. 1.

Fig. 3 is a plan view of the stationary mold.

Fig. 4 is a bottom view of the moving mold.

In the figure: 1. a base; 2. fixing a mold; 21. a die cavity is fixed; 22. an expansion slot; 221. a first exhaust groove; 23. a gas guide groove; 24. a gas-guide hole; 25. a first air extraction hole; 26. a second air extraction hole; 3. an exhaust pipe; 4. an injection port; 5. a lifting plate; 6. moving the mold; 61. a movable model cavity; 62. a convex column; 63. a second exhaust groove; 7. and (4) a flow channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in combination with the following embodiments. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The specific implementation mode is as follows: referring to fig. 1-4, the die-casting die comprises a base 1 and a lifting plate 5 which are in sliding connection, wherein an exhaust pipe 3 is arranged below the base 1, and when the die-casting die is used, the exhaust pipe 3 is connected with a vacuum pumping device such as a vacuum pump through a pipeline. A fixed die 2 is arranged above the base 1, and a movable die 6 is arranged below the lifting plate 5. An injection port 4 is formed in the top of the lifting plate 5, a runner 7 is formed in the movable mold 6 and the lifting plate 5, and the runner 7 is communicated with a movable mold cavity 61 in the movable mold 6. And an air guide groove 23 is formed in the periphery of the fixed die cavity 21 at the top of the fixed die 2, and the cross section area of the air guide groove 23 is large and can reach about 1 square centimeter. Be provided with a plurality of first exhaust groove 221 rather than the intercommunication around the cover half die cavity 21, the cross-sectional area of first exhaust groove 221 is less, is less than 1 square millimeter generally, preferably below 0.5 square millimeter, first exhaust groove 221 intercommunication has expansion groove 22, first exhaust groove 221 and expansion groove 22 are located between cover half die cavity 21 and the air guide groove 23, be provided with air guide hole 24 on the air guide groove 23, air guide hole 24 passes through the extraction opening and communicates with exhaust tube 3. A second exhaust groove 63 for communicating the expansion groove 22 and the air guide groove 23 when the fixed mold 2 and the movable mold 6 are combined together is arranged on the movable mold cavity 61 at the bottom of the movable mold 6, the cross-sectional area of the second exhaust groove 63 is relatively small and is generally smaller than 1 square millimeter, and the extending direction of the second exhaust groove 63 can be linear or curved. The cross-sectional area of the expansion groove 22 is much larger than that of the first exhaust groove 221, so that the molten metal is greatly slowed down after entering the expansion groove 22 through the first exhaust groove 221, is easily solidified, and is not easily entered into the second exhaust groove 63.

The fixed die 2 is provided with a convex column 62 at a position corresponding to the expansion groove 22, and the convex column 62 is hemispherical. When the fixed mold 2 and the movable mold 6 are combined together, the convex post 62 is located inside the expanding groove 22 and is blocked in front of the first exhaust groove 221 with a gap left between the convex post and the first exhaust groove 221, so that the molten metal entering from the first exhaust groove 221 does not directly face the second exhaust groove 63.

The expansion groove 22 is formed in a hemispherical shape, and when the movable mold 6 moves upward, the metal solid in the expansion groove 22 is easily separated from the fixed mold 2.

The air exhaust holes comprise a first air exhaust hole 25 and a second air exhaust hole 26, wherein the first air exhaust hole 25 and the second air exhaust hole 26 are communicated with each other, the extending direction of the first air exhaust hole is the horizontal direction, the extending direction of the second air exhaust hole is the vertical direction, the first air exhaust hole 25 is communicated with the air guide hole 24, and the second air exhaust hole 26 is communicated with the air exhaust pipe 3. The first pumping hole 25 is located at an upper portion of the air guide hole 24. In case that metal particles enter the air guide hole 24 through the air guide groove 23, they do not easily enter the suction hole and thus do not enter the vacuum pumping means.

In practical use, after the fixed mold 2 and the movable mold 6 are combined together, the fixed mold cavity 21 and the movable mold cavity 61 form a cavity for molding a casting, the cavity is communicated with the exhaust pipe 3 sequentially through the first exhaust groove 221, the expansion groove 22, the second exhaust groove 63, the air guide groove 23, the air guide hole 24, the first exhaust hole 25 and the second exhaust hole 26, and the cavity can be vacuumized by the operation of the vacuumizing device. After the vacuum pumping operation is completed, the molten metal is injected into the cavity through the injection port 4 and the flow passage 7, and the molten metal enters the first exhaust groove 221 under the action of vacuum and pressure, and then is solidified in the expansion groove 22, so that the molten metal is difficult to enter the second exhaust groove 63, and even if the molten metal enters the second exhaust groove 63, the molten metal is quickly solidified under the cooling of the mold due to the small cross section of the molten metal. Therefore, the die-casting die can omit an oil cylinder, a slide valve and related structures of the oil cylinder and the slide valve, and is high in reliability. In addition, as we know, the air in the cavity cannot be completely pumped out by vacuum pumping, a small amount of air remained in the cavity can be fed into the air guide groove 23, the air guide hole 24, the first air pumping hole 25, the second air pumping hole 26, the air pumping pipe 3 and the vacuum pumping pipeline by the metal hydraulic pressure, so that the air holes are less prone to be generated, and the finally remained gas cannot block the molten metal from entering the cavity, so that the generation of cold streaks is reduced.

It should be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundary of the appended claims, or the equivalents of such scope and boundary.

Claims

1. The utility model provides a die-casting die, includes base (1) and lifter plate (5), both sliding connection, base (1) below is provided with exhaust tube (3), base (1) top is provided with decides mould (2), lifter plate (5) below is provided with moves mould (6), its characterized in that: a gas guide groove (23) is formed in the periphery of a fixed die cavity (21) at the top of the fixed die (2), a plurality of first exhaust grooves (221) communicated with the fixed die cavity are formed in the periphery of the fixed die cavity (21), the first exhaust grooves (221) are communicated with expansion grooves (22), the first exhaust grooves (221) and the expansion grooves (22) are located between the fixed die cavity (21) and the gas guide groove (23), gas guide holes (24) are formed in the gas guide grooves (23), and the gas guide holes (24) are communicated with the exhaust pipes (3) through exhaust holes; and a second exhaust groove (63) which is used for communicating the expansion groove (22) and the air guide groove (23) when the fixed die (2) and the movable die (6) are combined together is arranged on the movable die cavity (61) at the bottom of the movable die (6).

2. A die casting mold as claimed in claim 1, wherein: the fixed die (2) is provided with a convex column (62) at a position corresponding to the expansion groove (22), and the convex column (62) is hemispherical.

3. A die casting mold as claimed in claim 2, wherein: the expansion groove (22) is hemispherical.

4. A die casting mold as claimed in claim 1, wherein: the air exhaust holes comprise a first air exhaust hole (25) and a second air exhaust hole (26), wherein the first air exhaust hole (25) and the second air exhaust hole (26) are communicated with each other, the extending direction of the first air exhaust hole is the horizontal direction, the extending direction of the second air exhaust hole is the vertical direction, the first air exhaust hole (25) is communicated with the air guide hole (24), and the second air exhaust hole (26) is communicated with the air exhaust pipe (3).

5. A die casting mold as claimed in claim 4, wherein: the first air exhaust hole (25) is positioned at the upper part of the air guide hole (24).